MADISON, Wis. (AP) – A northwestern Wisconsin Chippewa tribe has started raising money for a possible lawsuit challenging a giant iron mine near their reservation.  The Bad River Band of Lake Superior Chippewa has set up a link on the tribe’s website that allows visitors to donate directly to the tribe. The site also lists an address for mailing checks. The link features a headline that reads “Help us prevent mining in the Bad River Watershed by donating today!”  Gogebic Taconite wants to dig an open-pit mine just south of the tribe’s Ashland County reservation. Republican lawmakers passed a law earlier this month loosening the state’s mining regulations to help the company.  Tribal members fear pollution from the mine will contaminate their water and wild rice sloughs.